Gonorrhea spreads through sexual contact, including vaginal, anal, and oral sex. The bacteria that cause it, called Neisseria gonorrhoeae, infect the mucous membranes of the genitals, rectum, and throat. With over 543,000 cases reported in the United States in 2024 alone, it remains one of the most common sexually transmitted infections.
Sexual Contact Is the Primary Route
Gonorrhea passes from person to person when mucous membranes or bodily fluids from an infected site come into contact with a partner’s vulnerable tissue. The bacteria establish infection at whichever body part is exposed: the urethra, cervix, rectum, or throat. This means any combination of genital, anal, or oral contact can transmit the infection. The bacteria can also attach to sperm cells, which likely plays a role in transmission from males to their sexual partners.
You don’t need to have penetrative sex to contract gonorrhea. Any direct contact between an infected area and a partner’s mucous membranes is enough. Ejaculation is not required for transmission. A person remains infectious for as long as they carry the bacteria, which, without treatment, can persist indefinitely.
Oral Sex Carries Real Risk
Pharyngeal (throat) gonorrhea is more common than many people realize, and it spreads efficiently through oral-penile contact. Transmission from oral-vaginal contact is less efficient but still possible. Among men who have sex with men, pharyngeal gonorrhea prevalence ranges from 2% to 11%. Among heterosexual men, rates fall between 3% and 7%, and among women, between 2% and 10%.
One of the biggest problems with throat infections is that they rarely cause noticeable symptoms. In one study of young people tested for gonorrhea, 28% of all detected cases were pharyngeal-only infections that would have been completely missed without specific throat testing. That means a significant number of people with gonorrhea in their throat have no idea they’re infected and can pass the bacteria to a partner’s genitals during oral sex.
Most Infected People Have No Symptoms
The single biggest factor driving gonorrhea transmission is that the majority of infections are silent. Roughly 90% of women with urogenital gonorrhea show no symptoms at all. In men, estimates of asymptomatic infection range from 56% to 87%. When symptoms do appear, they typically show up 1 to 14 days after exposure, but many people never develop anything noticeable.
This matters because someone who feels perfectly healthy can unknowingly pass the infection to every sexual partner until they’re tested and treated. Rectal and throat infections are especially likely to be symptom-free, which is why screening at all exposed body sites is important for anyone at risk.
Transmission During Childbirth
A pregnant person with an untreated cervical infection can pass gonorrhea to their newborn during vaginal delivery. The baby’s eyes come into contact with infected genital secretions as they move through the birth canal. The most serious outcome is a severe eye infection called ophthalmia neonatorum, which can perforate the eye and cause blindness if untreated. In rare cases, the newborn can also develop bloodstream infection, joint infection, or meningitis.
This is why routine gonorrhea screening during pregnancy and preventive eye treatment for newborns are standard practice in most healthcare settings.
Self-Spread to Other Body Parts
It’s possible to transfer the bacteria from one part of your own body to another. The most concerning example is touching infected genital secretions and then touching your eyes, which can cause gonococcal conjunctivitis, a severe eye infection. This type of self-spread (sometimes called autoinoculation) can also happen through contaminated hands or, rarely, through shared items like towels.
Toilet Seats and Shared Objects
Gonorrhea is not considered a casual-contact infection. The bacteria are fragile outside the human body. Lab studies have shown that gonococci can survive up to 24 hours on surfaces like glass or towels at room temperature, and longer in cold conditions. However, survival on a surface and actual transmission are very different things. The bacteria need direct contact with a mucous membrane and a sufficient quantity to establish infection, which makes transmission from toilet seats, doorknobs, or swimming pools extremely unlikely in real-world conditions.
That said, the 24-hour survival window on towels does explain rare case reports of transmission through shared personal items. The practical takeaway: don’t share towels or washcloths with someone who has an active infection, but there’s no need to worry about public restrooms.
How Condoms Reduce Risk
Consistent condom use offers strong protection. Male condoms provide more than 90% protection against gonorrhea transmission. Observational studies have found risk reductions ranging from 49% to 75%, with the lower numbers reflecting real-world inconsistency in condom use rather than a flaw in the barrier itself. When used correctly every time, condoms are highly effective.
Condoms do have a limitation: they only protect the area they cover. Gonorrhea of the throat or rectum can still be transmitted during unprotected oral or anal contact even if a condom is used during vaginal sex. Dental dams during oral sex provide an additional barrier, though they are used far less commonly. For people with multiple partners or those in higher-risk groups, regular screening (every 3 to 12 months depending on risk level) is one of the most effective ways to catch and stop transmission early, especially given how often the infection causes no symptoms.